[FIXED] What is the c# equivalent of Java 8 java.util.function.Consumer<>?

Issue

Is there an equivalent of this interface in C#?

Example:

Consumer<Byte> consumer = new Consumer<>();
consumer.accept(data[11]);

I have searched around Func<> and Action<> but I have no idea.

The original Java code of Consumer.accept() interface is pretty simple. But not for me:

void accept(T t);

/**
* Returns a composed {@code Consumer} that performs, in sequence, this
* operation followed by the {@code after} operation. If performing either
* operation throws an exception, it is relayed to the caller of the
* composed operation.  If performing this operation throws an exception,
* the {@code after} operation will not be performed.
*
* @param after the operation to perform after this operation
* @return a composed {@code Consumer} that performs in sequence this
* operation followed by the {@code after} operation
* @throws NullPointerException if {@code after} is null
*/
default Consumer<T> andThen(Consumer<? super T> after) {
    Objects.requireNonNull(after);
    return (T t) -> { accept(t); after.accept(t); };
}

Solution

"Consumer interface represents an operation that accepts a single input argument and returns no result"

Well, provided that the quote above taken from here is accurate it’s roughly an equivalent of Action<T> delegate in C#;

For example this java code:

import java.util.function.Consumer;

public class Main {
  public static void main(String[] args) {
    Consumer<String> c = (x) -> System.out.println(x.toLowerCase());
    c.accept("Java2s.com");
  }
}

Converted to C# would be:

using System;

public class Main
{
  static void Main(string[] args)
  {
     Action<string> c = (x) => Console.WriteLine(x.ToLower());
     c.Invoke("Java2s.com"); // or simply c("Java2s.com");
  }
}

Answered By - Fabjan

Answer Checked By - Marie Seifert (PHPFixing Admin)